This is a multi with a twist - literally!
When you arrive at the co-ordinates you should, with the aid of the hint, find a container. In the container you will find a familiar puzzle with some instructions. Solve the puzzle using the instructions and you will have the co-ordinates of the cache. Please be careful with the puzzle. I've had to replace it 4 times already due to cachers breaking it. If you break it, please tell me.
If you can't solve the puzzle, or you just can't be bothered, the instructions contain a set of co-ordinates to take you to another location where you will find another container. This container holds the co-ordinates to the final location. It's a longer walk but it shouldn't add more than 10 minutes to your overall walk. Good luck.